556577989 has 16 divisors (see below), whose sum is σ = 641617920. Its totient is φ = 477837360.

The previous prime is 556577953. The next prime is 556578019. The reversal of 556577989 is 989775655.

It is not a de Polignac number, because 556577989 - 2¹⁵ = 556545221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556577929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6064 + ... + 33910.

It is an arithmetic number, because the mean of its divisors is an integer number (40101120).

Almost surely, 2^556577989 is an apocalyptic number.

It is an amenable number.

556577989 is a deficient number, since it is larger than the sum of its proper divisors (85039931).

556577989 is a wasteful number, since it uses less digits than its factorization.

556577989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27960.

The product of its digits is 23814000, while the sum is 61.

The square root of 556577989 is about 23591.9051583377. The cubic root of 556577989 is about 822.5746899281.

The spelling of 556577989 in words is "five hundred fifty-six million, five hundred seventy-seven thousand, nine hundred eighty-nine".